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engr > D3 basic statistics > Flashcards

D3 basic statistics Flashcards

1
Q

What is the mean of the numbers 2, 4, 6, 8, and 10?

A) 6
B) 7
C) 8
D) 10

A

A

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2
Q

Which of the following is the median of the numbers 5, 7, 3, 9, and 11?

A) 5
B) 7
C) 9
D) 11

A

C

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3
Q

The mode of a dataset is defined as:

A) The average of a dataset
B) The middle value of a dataset
C) The most frequently occurring value
D) The range of the dataset

A

C

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4
Q

Which measure of central tendency is most affected by extreme values?

A) Mean
B) Median
C) Mode
D) Range

A

A

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5
Q

What does the range of a dataset represent?

A) The most frequent value
B) The average value
C) The difference between the highest and lowest values
D) The middle value

A

C

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6
Q

Which of the following best describes standard deviation?

A) A measure of spread in the data
B) A measure of central tendency
C) The middle value
D) The highest value minus the lowest value

A

A

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7
Q

If a dataset has values 5, 5, 5, 5, what is its variance?

A) 0
B) 5
C) 10
D) 15

A

A

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8
Q

What is the probability of rolling a 3 on a fair six-sided die?

A) 1/6
B) 1/4
C) 1/5
D) 1/3

A

A

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9
Q

In statistics, what does a histogram represent?

A) The spread of data
B) The frequency of data within intervals
C) The average of data points
D) The probability distribution

A

B

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10
Q

Which type of data is represented by categories?

A) Quantitative
B) Ordinal
C) Continuous
D) Categorical

A

D

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11
Q

In a normal distribution, approximately what percentage of data falls within one standard deviation of the mean?

A) 50%
B) 68%
C) 75%
D) 95%

A

B

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12
Q

What is the primary purpose of a scatter plot?

A) To show the mean
B) To display frequency distribution
C) To analyze the relationship between two variables
D) To calculate probability

A

C

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13
Q

Which type of variable represents quantities that can be counted, like the number of students in a class?

A) Discrete
B) Continuous
C) Nominal
D) Ordinal

A

A

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14
Q

What type of variable represents data that can take on any value within a range, like height?

A) Discrete
B) Continuous
C) Ordinal
D) Nominal

A

B

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15
Q

If the mean of a dataset is 10 and the median is 15, the data is likely:

A) Symmetrical
B) Skewed to the right
C) Skewed to the left
D) Uniform

A

B

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16
Q

Which measure of spread is calculated as the difference between the highest and lowest values?

A) Variance
B) Range
C) Mode
D) Standard deviation

A

B

17
Q

What is the probability of drawing an ace from a standard deck of 52 cards?

A) 1/13
B) 1/26
C) 1/52
D) 4/52

A

A

18
Q

What is the term for a sample that accurately represents the population from which it was drawn?

A) Random sample
B) Biased sample
C) Controlled sample
D) Systematic sample

A

A

19
Q

What type of graph is best for displaying the frequency of categorical data?

A) Histogram
B) Bar chart
C) Scatter plot
D) Line graph

A

B

20
Q

If two events cannot happen at the same time, they are called:

A) Independent
B) Dependent
C) Mutually exclusive
D) Inclusive

A

C

21
Q

The median is defined as:

A) The most frequent value
B) The middle value when data is ordered
C) The average of a dataset
D) The difference between highest and lowest values

A

B

22
Q

Which of the following data types is continuous?

A) Age
B) Gender
C) Eye color
D) Number of pets

A

B

23
Q

What does a box plot display about a dataset?

A) The mean and range
B) The quartiles and median
C) The mode and variance
D) The probability and standard deviation

A

B

24
Q

What is an outlier in a dataset?

A) A value much higher or lower than the rest
B) The median value
C) The average value
D) The most frequent value

A

A

25
Q

Which of the following is a measure of central tendency?

A) Variance
B) Median
C) Mean
D) Mode

A

C

26
Q

What is the sum of probabilities for all possible outcomes in a probability distribution?

A) 50%
B) 100%
C) 150%
D) 200%

A

B

27
Q

The interquartile range (IQR) is the range of values between:

A) The first and third quartiles
B) The minimum and maximum
C) The median and mean
D) The mode and range

A

B

28
Q

What is a bar graph typically used to display?

A) Continuous data
B) Categorical data
C) Ordinal data
D) Quantitative data

A

A

29
Q

Which type of data has meaningful zero points and can be used in calculations?

A) Ordinal
B) Nominal
C) Ratio
D) Interval

A

C

30
Q

The probability of a single event is defined as:

A) The ratio of the number of favorable outcomes to the total outcomes
B) The number of outcomes divided by the sample space
C) The number of favorable outcomes multiplied by total outcomes
D) The chance of observing the outcome

A

A

engr (6 decks)

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